I am currently using Nexus 6P which I did pre-order when it first launched as a replacement of Nexus 5. It is a solid phone, made from good materials, doesn't feel cheap in your hand. The design is nice and simple. The screen of 5.7 inches is very responsive and not too big to hold. I appreciate bigger screen especially when watching youtube. It's just more enjoyable. Plus the double front stereo speaker produces better sound. The camera is decent but you can't zoom to see clear detail of taken pictures as Nexus 5. The battery is the main problem for me. It drains quite fast due to its screen display. It's also overheat some times which worries me. Maybe I just got a bad one. Another issue, google changed the charging cable from USB 3 port (nexus 5) to USB C (both side). So you can't just plug into normal USB port and need to carry extra cable to do so. Overall, it is a great phone.

Pros:
Newest android update
Cheaper compare to other phones in similar specs
Good camera
Nice screen and speaker
Feels good in hand and has a good weight to it
Good design
Fingerprint works well
Fast charging

Cons:
Battery drain
Overheating
USB C port